Asen Genov is pretty furious. His personal data was made public this week after records of more than 5 million Bulgarians got stolen by hackers from the country’s tax revenue office.

In a country of just 7 million people, the scale of the hack means that just about every working adult has been affected.

“We should all be angry. … The information is now freely available to anyone. Many, many people in Bulgaria already have this file, and I believe that it’s not only in Bulgaria,” said Genov, a blogger and political analyst. He knows his data was compromised because, though he’s not an IT expert, he managed to find the stolen files online.